Boiler



April 7, 1925. 1,532,999

R. GREENHAM BQI LE8 filed June 6, 1922 [Jim Emu E/CHAED cfEff/YHA/f E W W Patented Apr. 7, 1925.

UNHTEET RICHARD GR-E-ENHAIE. OF SAN FEAIl'CZSCC, CALIFORNIA.

BOILER.

Application filed June 6,

To all whom it may concern:

Be it known that I, RICHARD tinnnivnntt, a citizen of the United States, residing at the city and county of San Francisco and State of California, have invented new and useful Improvements in Boilers, of which the following is a specification. V

This invention relates to a boiler or heater, and particularly to that type employed in conjunction with heating systems where hot Water radiators and the like are used.

The object of the present invention is to generally improve and simplify boilers of the character described; to provide a boiler having two individual sections or compartments formed therein, and to connect the radiators or the like with said compartments in such a manner that added heating efficiency and uniform circulation will be obtained. Further objects will hereinafter appear. I

One form which my invention may assume is exemplified in the following description and illustrated in the accompanying drawings, in which- Fig. 1 is a central, vertical, longitudinal section of the boiler.

Fig. 2 is a cross section on line 22, Fig. 1.

Fig. 3 is a'diagrammatic view showing one method of connecting the radiators with the boiler.

Referring to the drawings in detail, and particularly to Figs. 1 and 2, it will be seen that the boiler consists of an exterior cylindrical shell A, an inner cone shaped shell 2, which is concentrically positioned with relation thereto, a bottom section 3, and a head member 4. The inner cone section 2 forms the firebox, and a door of suitable construction is provided, as at 5. A grate may be placed within the firebox if coal or similar fuel is employed, and it may obviously be eliminated if gas or oil burners are employed.

An annular water chamber is formed intermediate the shells A and 2 and this chamber is divided into two compartments by a pair of partition plates 6 and 7, two separate compartments B and C being in this manner formed. Compartment B is provided with discharge and inlet connections as indicated at 8 and 9, respectively, and the compartment C is similarly providedwith discharge and inlet connections as indicated at 10 and 11, respectively. A double or erial No. 568,346.

duplex boiler is in this manner formed and this is preferably connected with the radiators of a heating system as indicated in Fig. In this figure D indicates one radiator .nd a second radiator. The radiator D provided with an upper inlet connection 2 =nd a lower discha e connection 13 The J3 inlet connection is connected withthe section B of the boiler by means of a pipe 1a,

and the discharge of the radiator is connected with the inlet of the opposite section of the boiler indicated at C .by means of a pipe 15. The radiator E is similarly provided with-inlet and discharge connections, as indicated at-16 and 17, respectively, the inlet connection communicating with the discharge of the compartment C of the boiler by means of a pipe 18, While the discharge of the radiator is connected by means of a pipe 19 with the inlet of the compartment or section B of the boiler. In other words the hot water discharging from one compartment rises upwardly by a thermosiphon action, and as it passes through the radiator and cools, it enters the inlet of the opposite boiler section which is arranged at the lower end thereof. The discharge of that section of the'boiler permits the hot water to enter the inlet of the other radiator and as it cools and discharges it drops by gravity into the inlet ofthe' opposite boiler section. In this manner a rapid circulation is maintained and increased heating efficiency as cooling of the water takes place directly in the radiators and not in an expansion tank as is usually the case. The present system may be provided with an expansion tank, as indicated at 20, and this may be connected with the pipe 15 as shown. A very small amount of heat is however lost in this tank as in actual practice it is found that the water contained therein seldom exceeds a lukewarm temperature, while the temperature of the radiators mayreach 160 to 180 degrees. i

The boiler illustrated in the present instance is a welded type of boiler and as shown employs no fire tubes. Such tubes may obviously be employed if added heating area is desired, but for purposes of illustration the simplest type of boiler possible has been shown, the important feature of the present invention being the division of the boiler in such a manner that two, so. to speak, distinct boilers are formed, this being necessary as the circulating system shown in Fig. 3' could otherwise not beformed. I similarly Wish it" understood that arious changes in form and proportion may be resorted to Within the scope of the appended;

claims; also that the materials and finish of the several parts employed may be such as the experience and judgment of the manufacturer may dictate or Various uses may demand. 7

jarring thus described my inventiongl hat I claim and desire to secure by Letters Patent is- V v f 1. In a heating and circulating system of the elmracter described a boiler comprising zin exterior shell, an interior shell concentric therewith and spaced therefrom, said inner shell" forming an annular compartment it pair of radially, oppositely disposed partition members interposed between the exterior and the interior shell and dividing the annular comprrt-ine nt into two sepa-' 'ment separate discharge connections .ment, a pair of radially, oppositely disposed partition members interposed between the exterior and the interiorshell sad dividingthe annular compartments in'to'two separate com-par ments', s'epa-mte' inlet connections" disposed at the lower end of each compa posed at the ripper end of each" conhpai-fimerit, a pipe connecting thedrschar e'outlet of on" boiler compartment with the inlet named hoiler comp'jtr V r the first. named boiler" o npartmnt.

RIGHA'RD GREENHAM; 

